These documents cover a variety of operating systems that Apple has attempted to create as well as those that it has previously developed.
We will encounter a number of technologies throughout this lecture, the fusion of which ultimately produced Mac OS X. Understanding the motivations behind Mac OS X and its key components better is one of the discussion's major objectives.
They include numerous additional systems that were either direct or indirect inspirations, in addition to Mac OS X and its relevant forebears, as well as the various operating systems that Apple has experimented with since the company's founding.